Here’s a new video clip of Britain’s most expensive supercar, the £1.25 million (that’s about US$1.9 million or €1.4 million) Aston Martin One-77 undergoing extensive testing in advance of the first customer deliveries scheduled for later this year.

Aston Martin’s most exclusive vehicle to date, is also the automaker’s fastest having already recorded a top speed of 220.007mph or 354.86 km/h during testing in December at a secret proving ground in southern Europe.

Aston Martin believes that its pride and joy can go even faster as the company had then pointed out that the 220mph velocity was achieved in “dry but windy conditions”.

The One-77 is powered by a front-mounted 7.3-liter V12 engine pushing out somewhere around 750 horsepower and is expected to hit 0-60mph (96km/h) in 3.5 seconds.

All in all, Aston Martin plans to build a mere 77 numbered units of the One-77 – hence its name.